/*
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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/*
 * Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
 */

package javax.xml.stream;

/**
 * An error class for reporting factory configuration errors.
 *
 * @version 1.0
 * @author Copyright (c) 2009 by Oracle Corporation. All Rights Reserved.
 * @since 1.6
 */
public class FactoryConfigurationError extends Error {
    private static final long serialVersionUID = -2994412584589975744L;

    Exception nested;

    /**
     * Default constructor
     */
    public FactoryConfigurationError() {
    }

    /**
     * Construct an exception with a nested inner exception
     *
     * @param e the exception to nest
     */
    public FactoryConfigurationError(java.lang.Exception e) {
        nested = e;
    }

    /**
     * Construct an exception with a nested inner exception
     * and a message
     *
     * @param e the exception to nest
     * @param msg the message to report
     */
    public FactoryConfigurationError(java.lang.Exception e, java.lang.String msg) {
        super(msg);
        nested = e;
    }

    /**
     * Construct an exception with a nested inner exception
     * and a message
     *
     * @param msg the message to report
     * @param e the exception to nest
     */
    public FactoryConfigurationError(java.lang.String msg, java.lang.Exception e) {
        super(msg);
        nested = e;
    }

    /**
     * Construct an exception with associated message
     *
     * @param msg the message to report
     */
    public FactoryConfigurationError(java.lang.String msg) {
        super(msg);
    }

    /**
     * Return the nested exception (if any)
     *
     * @return the nested exception or null
     */
    public Exception getException() {
        return nested;
    }

    /**
     * use the exception chaining mechanism of JDK1.4
    */
    @Override
    public Throwable getCause() {
        return nested;
    }

    /**
     * Report the message associated with this error
     *
     * @return the string value of the message
     */
    public String getMessage() {
        String msg = super.getMessage();
        if (msg != null)
            return msg;
        if (nested != null) {
            msg = nested.getMessage();
            if (msg == null)
                msg = nested.getClass().toString();
        }
        return msg;
    }

}
